The Backbone Structure of the Sulfated Galactan from Plocamium costatum (C. Agardh) Hook. f. et Harv. (Plocamiaceae, Rhodophyta)
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R. Falshaw
Abstract
The polysaccharide extracted from Plocamium costatum has been examined by chemical and spectroscopic techniques. Glycosyl linkage analysis of the native polysaccharide revealed a complex sulfated galactan, but the substitution and linkage pattern was not obvious, partly because the 4-linked units are nearly all 3-sulfated and a high proportion of the 3-linked units are 4-sulfated. Glycosyl linkage and 13C NMR spectroscopic analysis of a solvolytically desulfated sample, however, confirmed a backbone structure of alternating 3-linked β-D-galactopyranosyl and 4-linked α-galactopyranosyl units as expected for a red algal galactan. The 4-linked galactosyl units, however, are present in both the D- and L-configuration in approximately equal amounts.
Copyright (c)1999 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Cymodocea nodosa (Ucria) Aschers. as a Bioindicator of Metals in Thermaikos Gulf, Greece, during Monthly Samplings
- The Backbone Structure of the Sulfated Galactan from Plocamium costatum (C. Agardh) Hook. f. et Harv. (Plocamiaceae, Rhodophyta)
- Effects of Short-Term Variations of Salinity and Temperature on the Photosynthetic Response of the Red Alga Grateloupia doryphora from Brittany (France)
- The Role of Polyphenols from the Tropical Brown Alga Sargassum furcatum on the Feeding by Amphipod Herbivores
- Taxonomic Notes on Marine Algae from Malaysia I. Six Species of Rhodophyceae
- Biotechnological Investigation for the Prevention of Marine Biofouling II. Blue-Green Algae as Potential Producers of Biogenic Agents for the Growth Inhibition of Microfouling Organisms
- A Survey on a Persistent Greenish Bloom in the Comacchio Lagoons (Ferrara, Italy)
- Life History, Reproduction and Growth of Gracilaria domingensis (Gracilariales, Rhodophyta) from Brazil
